timekeeper: initial implementation

src/arch/x86_64/include/arch/timekeeper.h

@@ -0,0 +1,11 @@
+#ifndef _TIMEKEEPER_H_INCLUDE
+#define _TIMEKEEPER_H_INCLUDE
+
+#include <time.h>
+
+struct timespec arch_timekeeper_gettime();
+struct timespec arch_timekeeper_gettimefromboot();
+
+void arch_timekeeper_init();
+
+#endif

src/arch/x86_64/main.c

@@ -18,6 +18,7 @@
 #include <arch/smp.h>
 #include <kernel/timer.h>
 #include <kernel/keyboard.h>
+#include <arch/timekeeper.h>
 
 void kmain(){
 
@@ -29,8 +30,7 @@ void kmain(){
 
 	idt_bspinit();
 	
-	pmm_init();
-	
+	pmm_init();	
 	
 	arch_mmu_init();
 	
@@ -48,6 +48,8 @@ void kmain(){
 
 	hpet_init();
 
+	arch_timekeeper_init();
+
 	timer_init();
 
 	vfs_init();

src/arch/x86_64/timekeeper.c

@@ -0,0 +1,47 @@
+#include <arch/timekeeper.h>
+#include <limine.h>
+#include <arch/panic.h>
+#include <arch/hpet.h>
+
+static time_t bootunixtime;
+static time_t timerticksperus;
+static time_t timerusatboot;
+
+static volatile struct limine_boot_time_request lim_boottime = {
+	.id = LIMINE_BOOT_TIME_REQUEST,
+	.revision = 0,
+};
+
+struct timespec arch_timekeeper_gettimefromboot(){
+	struct timespec time;
+
+	time_t timercurrentus = hpet_get_counter() / timerticksperus - timerusatboot;
+
+	time.tv_sec = timercurrentus / US_IN_SECS;
+	time.tv_nsec = (timercurrentus % US_IN_SECS) * NS_IN_US;
+
+	return time;
+
+}
+
+struct timespec arch_timekeeper_gettime(){
+	struct timespec time;
+	struct timespec timefromboot = arch_timekeeper_gettimefromboot();
+	time.tv_sec = bootunixtime + timefromboot.tv_sec;
+	time.tv_nsec = timefromboot.tv_nsec;
+
+	return time;
+
+}
+
+void arch_timekeeper_init(){
+	
+	if(!lim_boottime.response)
+		_panic("No limine boot time response\n", 0);
+	
+	bootunixtime = lim_boottime.response->boot_time;
+
+	timerticksperus  = hpet_get_ticksperus();
+	
+	timerusatboot = hpet_get_counter() / timerticksperus;
+}